Valve-gear



(NoModL) J. W. TAYLOR.

VALVE GEAR. NQ.. 307,238. Patented 0013. 28, 1884;

WITNESSES ATTORNEYS.

PETERS. Pmxu-mho n mr. Washinghm. n. c.

UNITED STATES PATENT Orrrca JOHN W. TAYLOR, OF PITTSTON, PENNSYLVANIA,

VALVE-GEAR.

SPEGEFT CATION forming part of Letters Patent No. 307,238, dated October 28, 1884.

Application filed January 19, 1884 (No model.)

To all whom, it may concern.-

Be it known that I, JOHN W. TAYLOR, of Pittston. in the county of Luzerne and. State of Pennsylvania, have inventeda new and Improved Valve-Gear, of which the following is a full, clear, and exact description.

My invention consists of a simple contrivance of a radiallygrooved rocking disk worked by the eccentric, with the valve-rod and a shifting-lever and connections, whereby the valverod connected to said grooved rocking disk for being reciprocated by it to work the valve may be shifted along the groove of the disk to vary the length of the stroke of the valve, and may be shifted from one side of the disk, to the other across the axis of the same to reverse the motion of the engine, thus making asimple variable cut-off and. reversinggear with a single eccentric, and dispensing with the link-motion commonly employed for the purpose, all as hereinafter fully described. H

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation of a steam-engine contrived with my improved valve-gear. Fig. 2 is a plan View, and Fig. 3 is a detail of the said valvegear in sectional elevation.

Instead of connecting the valve-rod a to the eccentric-rod b, I connect it to a rod, 0, which I connect by a sliding pin or block, d, and a radial groove, 6, in the disk f with said disk, in which the groove is made to traverse the disk from side to side, so that the pin or block (1 may shift along the groove toward or from the center of the disk on either side of the axis 9, and said pin or block dmay shift across said axis from one side to the other radially. The said pin or block d is connected by a link, h, with the armz' of a bell-cranlgwhose'other arm, j, is connected by a link, 70, with a shiftinglever, Z, said bell-crank being pivoted at its angle in at the top of supporting-posts n, so that the arm z may swing up and down readily to cause the pin or block d to traverse the grooved disk f. The disk f is mounted on suitable bearingsupports, 0, by its pivot-shaft g, and said shafthas a crank-arm, 9, attached to it, to which arm the eccentric-rod b is connected for rocking or oscillating the disk by the motions of a single eccentric, q. The shifting-lever has the usual notched catch-bans, and trip-latch t, for securing the lever in any desired position for holding the block or pin (1 in any position where it may be required to set it along the groovee for the desired length of stroke of the valve, and on either side of the center of the disk f, according to which way the engine is desired to run.

It will be understood that, the disk f being oscillated uniformly by the eccentric, its re spective sides opposite each other across the axis will simultaneously swing in opposite directions, so that the'valve will lead the driving-crank in reverse direction, according to which side the block or pin d may be set to the axis of disk f, and thus the motion of the en gine will be reversed by shifting the block or pin d from one side to the other of said disk. It will also be seen that the travel of the valve will be lengthened or shortened, according as the block or pin (1 is shifted from or toward the axis of the disk, which varies the cut-off accordingly, enabling the steam to be worked more or less expansively, according to the load of the engine; and it will also be seen that the engine-valve may also be used for stopping and starting the engine, for when the pin or block cl is set at the center of the disk thevalve will cover both steam-ports and the engine will cease to run. The valve will be opened to start the engine by shifting the block or pin (1 outward in the groove of the disk one way or the other, according to which way it is desired to run the engine.

I prefer to connect the eccentric-rod b to the crank-arm 1; by an adjusting-sleeve, u, and nuts 12, for readily adjusting them; also, to fit the connecting-pin w to the crank by a sliding block, at, for shifting said pin along the crank when it may be desired; and for the construction of the disk f, I prefer to form the groove 6 for the block or pin (1 between the edges of bars a and b, located at the center between the two side plates, 0, bar a being joined with the solid metal d of the disk at the bottom of the space between the sides 0, and bar 12 connected at the ends by stud-bolts 6 with earsf of the sides 0, which enables the connectingrod 0-, also the link h, to consist of two parallel bars, which may connect with the pin d at crank-arm p, crank-pin 20, and the valverod '0 being adj ustably connected, substantially as described.

2. The groove 6 for the shifting pin (2, formed between bars a and b, arrangedin the middle space between sides 0 of the disk, in combination with link h and connecting-rod 0, consisting of parallel bars connected to the ends of the pin each side of said bars a and 1), sub stantially as described.

3. The combination, with the valve-rod and the sliding block d, connected together as shown, of the rocking disk f, slotted crankarm 12, and the eccentric arm I), connected to the said crank-arm by the sleeve at, having the crank-pin w; and block 00 Within the slotted crank-arm, and the adj Listing-nuts c on either side of the sleeve u, substantially as set forth.

JOHN XV. TAYLOR.

Vitnesses:

S. P. FENN, F. H. KYTE. 

